Self-destruction injector and non-return structure thereof

Abstract

The invention relates a self-disposable syringe, which comprises a sleeve barrel, a rod piece and a non-return structure; wherein, a syringe needle can be matched and arranged at the top part of the sleeve barrel. The sleeve barrel is sleeved outside the rod piece, and the rod piece comprises at least a reinforced rib and at least a first locating piece, wherein, a first locating piece is assembled on at least one side of the reinforced rib. The non-return structure comprises a main body part, a first interference piece and a second interference piece, wherein, the first interference piece and the second interference piece are arranged on the main body part, a holding groove is arranged on the main body part of the non-return structure, wherein, the non-return structure is assembled on the reinforced rib of the rod piece through the holding groove and arranged between the sleeve barrel and the rod piece, one end part of the first interference piece is contacted with the rod piece, and one end part of the second interference piece is contacted with the inner wall of the sleeve barrel. After the injection of the syringe, the rod piece can be clamped into the sleeve barrel through the function of the non-return structure to limit the moving of the rod piece, thereby the syringe is self-disposable and cannot be used again after the injection.

Description

technical field [0001] The invention relates to a device for introducing a medium into the body by way of subcutaneous injection, intravenous injection or intramuscular injection, especially a syringe with a device for avoiding reuse. Background technique [0002] According to statistics, the number of deaths caused by unsafe injections in my country is as high as 390,000 cases every year, resulting in the loss of 6.89 million life years, and the direct medical expenses are as high as 142 million US dollars. The number of deaths caused by unsafe injections in the world is as high as 1.3 million cases every year. . [0003] Unsafe injections refer to injection methods that are unsafe for the recipients, medical staff, and the public environment, including repeated use of disposable syringes, lack of aseptic techniques, shared needles, and improper waste disposal, which can lead to infections such as hepatitis B and tuberculosis (TB), AIDS and other blood-borne infections. ...

AI Technical Summary

Problems solved by technology

[0004] In order to avoid the occurrence of the above-mentioned incidents, some self-destructing syringes are currently being used on the market. One of the structures is that a pull-back limiting structure is provided on the inner wall of the sleeve near the top. When the rod is pushed to the top, the rod will It will be firmly stuck, so that the rod cannot be pulled back to achieve the self-destruct effect, but this type of self-destruct syringe will show many shortcomings in actual use, for example: 1. When the rod is not pushed completely, the return The pull limit structure often loses its effect, and the rod cannot be stuck, so that the syringe can be used repeatedly; 2. This type of syringe requires high precision. If there is a quality problem, the rod may still be pulled if there is a quality problem. , unable to achieve the purpose of complete self-destruction; 3. The mold cost of this type of self-destruction syringe is relatively high

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